SimVertex.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2018 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include "Acts/Utilities/Definitions.hpp"
#include "ActsFatras/EventData/Particle.hpp"
#include "ActsFatras/EventData/ProcessType.hpp"

#include <vector>

namespace ActsExamples {

struct SimVertex {
  using Scalar = double;
  using Vector4 = Acts::ActsVector<Scalar, 4>;

  Vector4 position4 = Vector4::Zero();
  ActsFatras::ProcessType process = ActsFatras::ProcessType::eUndefined;
  std::vector<ActsFatras::Particle> incoming = {};
  std::vector<ActsFatras::Particle> outgoing = {};

  SimVertex(const Vector4& position4_, ActsFatras::ProcessType process_ =
                                           ActsFatras::ProcessType::eUndefined)
      : position4(position4_), process(process_) {}
  // explicitely default rule-of-five.
  SimVertex() = default;
  SimVertex(const SimVertex&) = default;
  SimVertex(SimVertex&&) = default;
  SimVertex& operator=(const SimVertex&) = default;
  SimVertex& operator=(SimVertex&&) = default;

  auto position() const { return position4.head<3>(); }
  Scalar time() const { return position4[3]; }
};

}  // namespace ActsExamples